[tex]a+b+c=90492 \\ a+b=66735 \\ b+c=71145 \\ 66735+c=90492 \Rightarrow c=90492-66735 \Rightarrow \boxed{c=23757} \\ b+23757=71145 \Rightarrow b=71145-23757 \Rightarrow \boxed{b=47388} \\ a+47388=66735 \Rightarrow a=66735 -47388 \Rightarrow \boxed{a=19347} \\ Verificare : 19347+47388+23757= \boxed{90492}[/tex]
